Do our urine contain NaCl salt??

[victor]

I read that in the tubulus contructus proximal, there are some Na+ active transport and the Cl- filtration..if these two ions meet, it will form NaCl..but I read again in the vesica urinaria, there's no NaCl there...the last step before goin' to vesica urinaria is giving the H+ and K+ to increase or decrease pH. the question is...id NaCl reabsorbed again??or it's excreted with the others??

[MrMistery]

Ok... This is basic chemistry: when you put a salt into water(or any solvent) it will turn into free ions. In this case if you put salt in a glass of water you get Na+ ions and Cl- ions. we say that the salt has disolved. Urine contains Both Na+ and Cl- ions, but they are not under the form of NaCl

[victor]

Ok..now I got it..but in my question it asked do our urine contains NaCl??Now I'll answer 'no'..right?? thanks for the answer..

[MrMistery]

I don't know if you should answer yes or no. If it was me i would say no. But if this a homework question, don't be surprised if your teacher tells you that you should have said yes. If he/she does, just explain him/her like i explained to you and you will get the points

[Natldnel]

I would say yes... Personally, i think this question is more of like about the composition of urine... Like there's urea, salt, water etc... So yeah, it should be a yes...

[victor]

The question is like this:
Our urine contains urea, amonia, creatin, creatinine and NaCl. (right/wrong)

I would say that this statement is right because it wasn't written NaCl (s) so I conclude that the NaCl is in the (aq) form as Na+ and Cl-

[MrMistery]

Yep... say it is correct... I have never heard of this expression(NaCl in urine) but you can look at it like that... The thing is urine contains a lot of other ions such as Ca2+, Mg2+ etc... So it would contian NaCl but also a lot of other stuff... But as that question is adressed, the answer is deffinetly yes

[victor]

Thanks for the answer..
Actually the sentence isn't specific enoug..but no prob.

[1luxorone]

i know this is a very old thread.
but i was wondering, would it be possible to extract salt from urine, and if so how would you go about it?

[JackBean]

Evaporate water?

[mith]

add kcl.

[zami'87.]

@mith
I think it has something to do with solubility on different temperatures(making solution can be endothermic or egzothermic,it depends on salt)..and fractional crystalization..
KCl? I think he should add KNO3?